The preparation of rhenium(V) oxo and imido complexes with Et 2NCSNHCOPh and Et 2NCSBC(NH)Ph. The x-ray crystal structure of [ReOCl(PhCONCSNEt 2) 2

Abstract

Reaction of [Bu n 4N][ReOcl 4] with two equivalents of the bidentate (1−) oxygen/sulphur donor ligand N,N-diethyl-N′-benzoylthiourea (DEBTH) or the sulphur/nitrogen donor ligand N,N-diethyl-N′-benzoyliminothiourea (DEBITH) in dry methanol leads to the formation of the neutral complexes [ReOCl(DEBT) 2] (1) and [ReOCl (DEBIT) 2] (2). The X-ray crystal structure of 1 shows the complex has a pseudo-octahedral geometry with the oxo and chloride ligans in cis positions. Complex 1 reacts with substituted anilines, ArNH 2, to give the imido complex [ReCl(NAr)(DEBT) 2] in good yield and with PPh 3 to form the rhenium(III) complex [Re(DEBT) 2(PPh 3) 2] +. The spectroscopic and electrochemical properties of these complexes are discussed.